14066666 has 4 divisors (see below), whose sum is σ = 21100002. Its totient is φ = 7033332.

The previous prime is 14066651. The next prime is 14066671. The reversal of 14066666 is 66666041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10699441 + 3367225 = 3271^2 + 1835^2 .

14066666 is a modest number, since divided by 6666 gives 1406 as remainder.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3516665 + ... + 3516668.

Almost surely, 2^14066666 is an apocalyptic number.

14066666 is a deficient number, since it is larger than the sum of its proper divisors (7033336).

14066666 is an equidigital number, since it uses as much as digits as its factorization.

14066666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7033335.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 14066666 is about 3750.5554255337. Note that the first 3 decimals coincide. The cubic root of 14066666 is about 241.3961792278.

It can be divided in two parts, 14066 and 666, that multiplied together give a triangular number (9367956 = T₄₃₂₈).

The spelling of 14066666 in words is "fourteen million, sixty-six thousand, six hundred sixty-six".